The Return Refund and Exchange For WooCommerce – Return Management System, RMA Exchange, Wallet And Cancel Order Features plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.4.5 via several functions due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to overwrite linked refund image attachments, overwrite refund request message, overwrite order messages, and read order messages of other users.

The Return Refund and Exchange For WooCommerce – Return Management System, RMA Exchange, Wallet And Cancel Order Features plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 4.4.5 via the 'attachment' directory. This makes it possible for unauthenticated attackers to extract sensitive data stored insecurely in the /wp-content/attachment directory which can contain file attachments for order refunds.

The Return Refund and Exchange For WooCommerce WordPress plugin before 4.0.9 does not validate attachment files to be uploaded via an AJAX action available to unauthenticated users, which could allow them to upload arbitrary files such as PHP and lead to RCE